the springs do pretty good, they were a cheap set to get me started. They were direct bolt in replacements, so I would assume most of the higher end springs are probably longer than the stock ones?
I am not being limited by my shocks or brake lines, they are both sufficient. I actually ran without shocks for a while to see if that was the problem (made me sea sick). Maybe a longer shackle or just suck it up and get better springs